Personalized audio system and method

ABSTRACT

A personalized audio system and method that overcomes many of the broadcast-type disadvantages associated with conventional radio stations. According to one embodiment, the personalized audio system includes the following: (1) a user interface that enables a user of the personalized audio system to specify a profile for a personalized audio channel, (2) a sound recording library comprising a plurality of sound recordings, (3) a playlist generator that (a) selects a plurality of sound recording identifiers from a set of sound recording identifiers, wherein each of the plurality of sound recording identifiers identifies a sound recording that matches the profile and that is stored in the library, and that (b) creates a playlist that lists the plurality of sound recording identifiers in a particular order, and (4) a sound recording reproducing device for reproducing the plurality of identified sound recordings according to the particular order in which the sound recording identifiers are listed in the playlist so that the user can listen to the sound recordings. Advantageously, the personalized audio system does not provide the user with a way to determine the plurality of sound recording identifiers prior to the reproducing means reproducing the plurality of sound recordings, and the personalized audio system does not provide the user with a way to directly control which sound recording identifiers in the set are selected by the playlist generator to be included in the plurality of sound recording identifiers.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of co-pending U.S. application Ser.No. 09/800,956, filed Mar. 8, 2001, entitled “Personalized Audio Systemand Method,” which claims the benefit of U.S. Provisional ApplicationSer. No. 60/187,894, filed Mar. 8, 2000, and which is incorporatedherein in its entirety by this reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is generally related to systems for listening tomusic, and, more specifically, to a personalized audio system that givesa user of the system only limited control over the sound recordings thatget played, but, nevertheless, plays the sound recordings that the useris likely to enjoy.

2. Discussion of the Background

Those that frequently listen to music broadcasters (e.g., conventionalradio stations and other broadcasters of music) know all too well thatthe music broadcasters do not always play the songs that the listenerwants to hear. This is due to the simple fact that music broadcastersmust accommodate the tastes of a mass audience, and, as we all know, itis not possible to please all of the people all of the time. We eachhave our own unique likes and dislikes.

One solution to this problem is to increase the number of radio stationsand/or the number of cable stations that carry music, and therebyincrease the likelihood that a listener will find a station that isplaying a “good” song. However, this is not a practical solution becausethere is only a finite amount of bandwidth available to broadcast music,and this bandwidth is already at or near capacity. Further, it isprohibitively expensive to create additional bandwidth.

What is desired, therefore, is a system to overcome these and otherdisadvantages of conventional music broadcasting systems.

SUMMARY OF THE INVENTION

The present invention provides a personalized audio system and methodthat overcomes many of the broadcast-type disadvantages by creatingpersonalized audio channels. According to one embodiment, thepersonalized audio system includes the following: (1) a user interfacethat enables a user of the personalized audio system to specify aprofile for a personalized audio channel, (2) a sound recording librarycomprising a plurality of sound recordings, (3) a playlist generatorthat (a) selects one or more sound recording identifiers from a set ofsound recording identifiers, wherein each of the selected one or moresound recording identifiers identifies a sound recording that matchesthe profile and that is stored in the library, and that (b) creates aplaylist that lists the selected one or more sound recording identifiersin a particular order, and (4) a sound recording reproducing device forreproducing each of the identified sound recordings according to theparticular order in which the selected one or more sound recordingidentifiers are listed in the playlist so that the user can listen tothe sound recordings.

Advantageously, the personalized audio system can restrict the user'sability to determine the selected one or more sound recordingidentifiers prior to the reproducing means reproducing the identifiedsound recordings, and the personalized audio system does not provide theuser with a way to directly control which sound recording identifiers inthe set are selected by the playlist generator to be included in the setof selected one or more sound recording identifiers.

According to one embodiment, a method of the present invention includesthe steps of building a sound recording library on a storage device, thesound recording library having an associated library catalogue thatidentifies each sound recording that is in the library, receiving anindication from a user of the audio system that the user desires tolisten to a selected audio channel, selecting a sound recording from thesound recording library based on the selected audio channel, retrievingfrom the sound recording library the selected sound recording, andplaying the sound recording for the user.

Advantageously, in one embodiment, the step of building the soundrecording library includes the steps of: receiving through a receiver abroadcast sound recording, determining the identity of the broadcastsound recording, determining whether the sound recording is a neededsound recording or determining whether the user has indicated apreference for the sound recording, and adding the broadcast soundrecording to the library if the broadcast sound recording is needed orthe user has indicated a preference for the sound recording.

In another embodiment, the step of building the sound recording libraryincludes the steps of: determining whether the user has one or moresound recordings that he or she would like to add to the sound recordinglibrary, and if the user has one or more sound recordings that he or shewould like to add to the sound recording library, then (a) storing theone or more sound recordings on the storage device if they are notalready stored thereon, (b) updating the library catalogue such that theone or more sound recordings are identified as being in the library, and(c) updating the library catalogue to indicate that the one more soundrecordings are owned by the user.

According to another embodiment, a method of the present inventionincludes the steps of: receiving through the user interface input fromthe user, wherein the input indicates that the user desires to listen toa selected audio channel, the selected audio channel having a profile,selecting a sound recording that fits the profile of the selected audiochannel, determining whether the user owns the selected sound recording,determining whether the selected sound recording should bepre-announced, wherein the determination is based at least in part onwhether the selected sound recording is owned by the user, announcingthe sound recording to the user before reproducing the sound recordingonly if it is determined that the sound recording should bepre-announced, and reproducing the sound recording so that the user maylisten to the sound recording.

According to still another embodiment, a method of the present inventionincludes the steps of: receiving through a user interface input from auser, wherein the input comprises audio channel profile information,associating the profile information with an audio channel, receiving anindication from the user that the user desires to listen to the audiochannel, selecting a set of sound recordings based on the profileinformation and based on a statute, regulation, and/or contract inresponse to receiving the indication from the user, and reproducing eachselected sound recording for the user to hear, wherein the selected setof sound recordings are selected in a particular order and arereproduced in the particular order in which they are selected.

Further features and advantages of the present invention, as well as thestructure and operation of various embodiments of the present invention,are described in detail below with reference to the accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated herein and form partof the specification, illustrate various embodiments of the presentinvention and, together with the description, further serve to explainthe principles of the invention and to enable a person skilled in thepertinent art to make and use the invention. In the drawings, likereference numbers indicate identical or functionally similar elements.Additionally, the left-most digit(s) of a reference number identifiesthe drawing in which the reference number first appears.

FIG. 1 is a diagram of a conventional music broadcasting system.

FIG. 2 is a diagram of personalized audio listening system, according toone embodiment.

FIG. 3 is an illustration of a channel profile, according to oneembodiment.

FIG. 4 is an illustration of a playlist, according to one embodiment.

FIG. 5 is an illustration of a wanted list, according to one embodiment.

FIG. 6 is an illustration of a GUI page for enabling user 110 to selectan audio channel to listen to, according to one embodiment.

FIG. 7 is an illustration of a GUI page for enabling user 110 toactivate predefined audio channels and to create new audio channels,according to one embodiment.

FIG. 8 is an illustration of a GUI page that is presented to user 110after user 110 selects an audio channel to listen to, according to oneembodiment.

FIG. 9 is a flow chart illustrating a process, according to oneembodiment, performed by device 202 in response to user 110 selecting tolisten to an available, active channel.

FIGS. 10–14 and FIGS. 26–28 illustrate processes that are performed by aconsumer device in response to a user of the device selecting to listento an available, active audio channel.

FIG. 15 is an illustration of a GUI page for enabling user 110 topersonalize an audio channel, according to one embodiment.

FIG. 16 is an illustration of a genre equalizer for enabling user 110 tospecify the genre percentages, according to one embodiment.

FIG. 17 is an illustration of three style equalizers, according to oneembodiment.

FIGS. 18–22 are flow charts illustrating various processes than can beused to add sound recordings to local sound recording library 216.

FIG. 23 is a flow chart illustrating a process for updating a wantedlist, according to one embodiment.

FIG. 24 is an illustration of a state stable, according to oneembodiment.

FIG. 25 is an illustration of the library catalogue, according to oneembodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 is a diagram of a conventional music broadcasting system 100. Asshown in FIG. 1, there is illustrated a music broadcaster 102broadcasting sound recordings (e.g., songs) over three stations(stations A, B, and C) to listeners 110(1)–110(N). For the sake ofsimplicity, we can assume station A is devoted to Alternative music,station B is dedicated to Jazz, and station C is devoted to Classicalmusic. Also for the sake of simplicity, FIG. 1 only shows a single musicbroadcaster. However, it is well understood that there could exist anumber of music broadcasters like broadcaster 102, and that musicbroadcaster 102 may broadcast music over fewer or more stations thanthat shown. Additionally, broadcaster 102 may employ many networksand/or systems to broadcast music to listeners 110. Suchnetworks/systems include: satellite networks, cable television networks,the Internet, conventional radio towers, and other like networks andsystems.

Music broadcaster 102 has a master sound recording library 104 thatcontains a collection of sound recordings that are available to bebroadcast to the listeners 110. Additionally, music broadcaster 102 hasthree playlists 112, 114, and 116. Each playlist is associated with oneof the stations A, B, and C. As its name implies, a playlist contains anordered list of sound recording identifiers (e.g., song titles) thatidentify the sound recordings that are to be broadcast to listeners 110.Music broadcaster 102 uses the playlists to determine which soundrecordings to select from sound recording library 104 for broadcast tolisteners 110. For example, the music broadcaster 102 may broadcast thesound recordings listed in the playlist in the order in which they arelisted. The playlists may contain a day's worth of sound recordings, inwhich case, every day a new playlist is generated so that the musicbroadcaster 102 does not broadcast the same sound recordings in the sameorder two days in a row.

Listeners 110 each have at least a receiver 106 for receiving one of thestations of music and sound reproducing equipment 108 for reproducingthe received music. Because each station of music is necessarilybroadcast to each listener 110, music broadcaster 102 must select soundrecordings to broadcast that will be favorable to a wide audience. Inother words, play-lists 112, 114, and 116 each contain a list of soundrecordings that are expected to be enjoyed by a mass audience, ratherthan any particular listener 110.

Because of bandwidth limitation problems, it may be too costly for musicbroadcaster 102 to create a personalized audio station for each listener110. Thus, there may be times when broadcaster 102 is not broadcastingany sound recordings that a listener 110 prefers to receive. The systemshown in FIG. 2 is designed to overcome this problem.

Personalized Audio System 200

FIG. 2 shows a functional block diagram of a personalized audio system200 designed to enable listener 110 (also referred to as user 110) tolisten to and create one or more “personalized” audio channels. Apersonalized audio channel may be similar to a conventional radiostation in that the listener does not directly control the contents ofthe audio channel's playlist nor does user 110 have a means to view orotherwise determine the set of songs specified in the playlist. Forexample, user 110 does not control what songs get played when. But,unlike a conventional radio station, which plays the sound recordingsthat have a high likelihood of being enjoyed by a large audience, apersonalized audio channel plays the sound recordings that have a highlikelihood of appealing to user 110.

A personalized audio channel can be a music channel, an informationchannel, or a combination music/information channel. A personalizedmusic channel may be designed to play only the music or songs that havea high appeal to the individual listener. Similarly, a personalizedinformation channel plays sound recordings that contain information(e.g., stock quotes, sports news, weather information, etc.) that user110 wants to hear.

Audio system 200 includes a consumer device 202 (also referred to aspersonal audio device 202) and (optionally) a remote server 280.

Consumer Device 202

A block diagram of consumer device 202, according to one embodiment, isillustrated in FIG. 2. In the illustrated embodiment, consumer device202 includes one or more receivers 210 that are operable to tune to aparticular broadcast audio or audio/video channel, a network transmitteror interface 211 for transmitting signals to other computers (such asserver 280), a data processing unit 212, a persistent storage device214, a user interface 220, a decoder 222, an amplifier 224, and aremovable storage drive 276 (e.g., floppy disk drive or CD ROM drive).Any one or a combination of the following components may be optional:receiver 210, transmitter 211, storage device 214, decoder 222,amplifier 224, and storage drive 276.

Receiver 210 can be any device that can receive a data stream. Forexample, it can be any one or a combination of the following: a radiofrequency (RF) receiver for receiving data streams broadcast by radiowaves, a cable-tv receiver for receiving signals transmitted through ananalog or digital cable-tv system, a satellite receiver for receivingsignals transmitted by satellite, a network receiver for receiving datastreams transmitted through a network (e.g., the Internet), etc. It isalso contemplated that receiver 210 can function to transmit data aswell as receive data, in which case separate transmitter 211 may not beneeded, in which case device 210 is a transceiver.

Data processing unit 212 is adapted to control the operation of personalaudio device 202 through a software program 250. Data processing unit212 may include one or more programmable processors and memory (e.g.,RAM and ROM) for storing data and software program 250. Based on thedetailed description of the functionality of device 202 given below, oneskilled in the art is able create program 250.

User interface 220 allows user 110 to interact with audio device 202.User interface 220 includes input devices (e.g., keyboard, mouse,infrared remote control, etc.) for user 110 to input commands toprocessing unit 212. Additionally, in one embodiment, user interface 220includes a display screen for displaying a graphical user interface(GUI), which is generated by program 250, that enables user 110 to inputcommands and make selections. The display screen may be a standardtelevision monitor, a standard computer monitor, or any other displaydevice that is capable of displaying a user interface.

Storage device 214, in one embodiment, stores one or more soundrecordings (referred to as local sound recording library 216).Preferably, to prevent theft and/or copyright violations and for othersecurity reasons, each sound recording not owned by user 110 isencrypted and/or watermarked before the sound recording is placed in thelibrary 216. User 110 may be considered to own a sound recording in thecases where the user has either purchased the sound recording orotherwise has unrestricted possession of the sound recording.

Storage device 214, in one embodiment, also stores a library catalogue217. Catalogue 217 maintains a list of each sound recording that is inlocal sound recording library 216. FIG. 25 illustrates one embodiment oflibrary catalogue 217. In this embodiment, for each sound recording inlibrary 216, catalogue 217 keeps track of the genre(s) and style(s) towhich the sound recording belongs and also keeps track of whether or notuser 110 owns the sound recording.

In one embodiment, device 202 is a cable-tv set-top box or implementedwithin a cable-tv set-top box, server 280 is a “head-end sever” (i.e.,located at a cable system head-end), and device 202 communicates withserver 280 through the a cable-tv transmission system.

Features and Operation Of Consumer Device 202

As appreciated by one skilled in the art, the features and operationsdescribed below are illustrative and not mean to limit the invention.

Preferably, consumer device 202 does not provide any of the featuresdescribed below unless “authorized.” In one embodiment, user 110 isauthorized only if user 110 subscribes to a service provided by musicbroadcaster 102 or pays a certain sum money to a seller of consumerdevice 202.

Through user interface 220 and a software program 250, an authorizeduser 110 can perform a number of operations. User 110 can select tolisten to a particular audio channel, modify or delete an existing audiochannel, and, most importantly, create one or more personalized audiochannels. In one embodiment, user 110 can also use a separate computer299 to modify and delete existing audio channels and to create new audiochannels, provided that computer 299 is able to communicate with remoteserver 280 or device 202.

FIG. 6 illustrates a user interface page 600, according to oneembodiment, from which user 110 can (1) select an available, “active”channel to listen to, (2) activate additional channels, (3) modify anactive channel, and (4) delete an active channel. An active channel isan audio channel defined within device 202 that user 110 may select tolisten to. In contrast, an inactive channel is an audio channel definedwithin device 202 that user 110 may not select to listen to.

Page 600 includes a text window 602 for listing the active audiochannels. Page 600 also includes a listen-button 603, an activate-button604, a modify-button 606, a delete-button 608, and an off-button 609. Inone embodiment, the first time user 110 uses device 202, there are noactive audio channels, so the first step for user 110 is to activate oneor more audio channels. User 110 performs this function by firstselecting activate-button 604.

In response to user 110 activating button 604, a page 700 (see FIG. 7)is displayed to the user. Page 700 is referred to as the “activate audiochannels page.” From the activate audio channels page 700, user 110 canactivate one or more audio channels and, more importantly, user 110 cancreate a personalized audio channel. The process of creating apersonalized audio channel is described further below with reference toFIGS. 15–17.

Referring now to FIG. 7, a text box 702 lists all of the audio channelsthat are defined within device 202. These channels may includepre-loaded and user-created audio channels. Device 202 may be pre-loadedwith a variety of audio channels defined by a service provider (such asmusic broadcaster 102). The pre-loaded audio channels are identifiedaccording to the type of music and/or information associated with thechannel. For example, as shown in page 700, the following six pre-loadedmusic channels were pre-loaded: (1) Rock, (2) Jazz, (3) Blues, (4)Alternative, (5) Country, and (6) Top-40. The pre-loaded audio channelsmay be personalized by user 110 as described herein.

When an audio channel is pre-loaded into device 202, in one embodiment,an audio channel profile 219 associated with the predefined audiochannel is created and stored in storage device 214 or on remote server280. Each pre-loaded and user-created audio channel in system 200 has aprofile 219. A profile 219 contains profile information that is used inselecting the sound recordings that are played by the audio channel towhich the profile 219 belongs. Profile information includes informationrelated to or concerning a user's sound recording preferences. Profiles219 are described in greater detail further below with reference to FIG.3.

Additionally, in other embodiments, when an audio channel is pre-loaded,a plurality of sound recordings that match the audio channel's profile219 are placed in library 216, the library catalogue 217 isappropriately updated, and/or a playlist 218 and/or a wanted list 215associated with the audio channel is created and stored in storagedevice 214. Playlists 218 and wanted lists 215 are described in greaterdetail further below with reference to FIG. 4 and FIG. 5, respectively.

To activate one or more audio channels listed in window 702, user 110selects one or more of the audio channels by placing a mark in one ormore of the boxes adjacent to the audio channels and then selectsdone-button 706. In response to user 110 activating done-button 706,device 202 determines which of the listed channels were selected andthen changes the state of the selected channels from in-active toactive.

In one embodiment, device 202 maintains a state table 2400 (see FIG. 24)to keep track of the state of each defined audio channel. State table2400 includes a number of records 2402 equal in number to the number ofaudio channels defined in the system. Each record 2402 includes threefields. The first field stores the name of an audio channel, the secondfield stores a playlist 218 identifier, a profile 219 identifier, and/ora wanted list 215 identifier that identifies the playlist 218, theprofile 219, and/or the wanted list 215 associated with the audiochannel, respectively. The third field stores a state identifier toidentify the state of the channel.

Referring back to FIG. 6, page 600 enables user 110 to select to listento an “available” active audio channel. In one embodiment, one or moreof the active audio channels listed in window 602 may not be“available.” For example, an active audio channel may not be availableif device 202 does not have a receiver 210 and/or transmitter 211 andlocal sound recording library 216 does not contain a sufficient numberand/or variety of sound recordings that match the profile of the audiochannel. For instance, if a playlist that conforms to the DigitalMillenium Copyright Act (DMCA) (or some other statute, regulation, orcontract) cannot be created for a certain active audio channel becauselibrary 216 does not contain a sufficient number and/or variety of soundrecordings that match the profile of the audio channel, then the audiochannel may be “unavailable.” Methods for adding sound recordings tolibrary 216 for the purpose of, among other things, changing the statusof a channel from unavailable to available are described further belowwith reference to FIGS. 18–22.

In one embodiment, user 110 listens to an “available” active audiochannel by selecting one of the available, active audio channels listedin window 602 and then activating a listen-button 603. After user 110selects an available channel and activates listen-button 603, device 202plays one or more sound recordings that match the profile of theselected audio channel and a user interface page 800 (See FIG. 8) isdisplayed to user 110.

In one embodiment, from user 110's perspective, listening to an audiochannel is very similar to listening to a conventional radio station.What we mean by this is that when listening to an audio channel, user110 has no direct control over which songs get played and, in mostcases, user has no way of determining the next song that is to beplayed.

User 110, however, has indirect control over which songs get playedbecause user 110 has direct control over a channel's profile and achannel's profile specifies, among other things, the types of soundrecordings that the channel play at least a majority of the time. Thus,user 110 can specify that a particular audio channel should play HardRock songs and/or other songs matching other characteristics (e.g.,tempo) at least a majority of the time, but user 110 can not specifythat a particular set of Hard Rock songs will be played in a particularorder at any desired point in time. In other words, user 110 has nodirect control over the audio channel's playlist or the process throughwhich the audio channel selects songs to be played.

There is at least one exception to the above rule. User 110 may specifythat a particular set of sound recordings is played in a particularorder at a particular time if, and only if, user 110 owns a copy of eachsound recording in the set.

Referring now to FIG. 8, page 800 is exactly like page 600 except thatadditional command-buttons and a meta-data display area 850 are includedin page 800. The additional command-buttons include the following: anext-button 802, a purchase-button 804, a more-button 806, a like-button808, and a dislike-button 810.

As is appreciated by those skilled in the art, user interface pages 600,700, and 800 are not the only user interfaces that can be employed inthe present invention. Thus, it is understood that page 600, 700 and 800are used merely to illustrate an embodiment of the invention and not tolimit the invention.

FIG. 9 is a flow chart illustrating a process 900 performed by device202 in response to user 110 selecting to listen to an available, activechannel. Process 900 begins in step 902, where device 202 selects asound recording based on the channel selected by user 110. In oneembodiment, in addition to the selection of the sound recording beingbased on the channel selected by user 110, the selection is also basedon one or more provisions of a statute, regulation, or contract (e.g.,the DMCA). More specifically, in one embodiment, the audio system mayselect and play sound recordings for user 110 in such a manner that theuse of the audio system by user 110 falls within a statutory compulsorylicense provision(s).

In an embodiment where the selected sound recording is in local soundrecording library 216, the selected sound recording is retrieved fromstorage device 214, otherwise the selected sound recording may betransmitted from server 280 to device 202.

In step 904, device 202 then determines whether it can pre-announce thesound recording. Pre-announce means to audibly and/or visually informuser 110 of the title and artist of the selected sound recording priorto reproducing the sound recording for user 110. If it can pre-announcethe sound recording it may be allowed to pre-announce it (step 906),otherwise control passes to step 908.

Preferably, if the selected sound recording is a song or other type ofmusic, device 202 can not pre-announce the sound recording, unless sodoing does not “violate” a law (statute or regulation) or contract. Byviolate we mean not conforming to one or more provisions of a statute orregulation or contract. Thus, for example, to ensure that device 202does not violate the DMCA, device 202 might limit pre-announcements toonly those music sound recordings that are owned by user 110. In oneembodiment, device 202 determines which sound recordings that are ownedby user 110 by examining library catalogue 217, which, as mentionedearlier, keeps track of which songs in library 216 are owned by user110.

In step 908, device 202 plays the selected sound recording for user 110to hear. While the sound recording is being reproduced for user 110,device 202 performs steps 910–924. In step 910, device 202 determineswhether the sound recording selected in step 902 is finished playing. Ifit is, control passes back to step 902, otherwise control passes to step912.

In step 912, device 202 determines whether user 110 has selected one ofthe buttons 802–810 or has selected off-button 609 or has selected tolisten to a new audio channel. If no button is activated and if user 110hasn't selected to listen to a new audio channel, control passes back tostep 910, otherwise control passes to step 913 (next-button activated802 or user 110 has selected to listen to a new audio channel), step 914(purchase-button 804 activated), step 918 (more-button 806 activated),step 920 (like-button 808 activated), step 922 (dislike-button 810activated), or step 924 (off-button 609 activated).

If user 110 selects next-button 802 or user 110 selects to listen to adifferent audio channel (e.g., user 110 selects a new audio channel frombox 602 and then activates listen-button 603), device 202 stopsreproducing the current sound recording (step 913). Control then passesback to step 902 where another sound recording is selected based on thecurrently selected audio channel.

In one embodiment, user 110's use of next-button 802 may be limited. Forexample, in one embodiment, user 110 may only activate next-button 802 apredetermined number of times in any given predetermined time interval.If user 110's activation of next-button 802 causes this limit to beexceeded, then device 202 will not skip to the next sound recording inresponse to the activation, as it normally would. A reason for thisfeature is to ensure that the set of sound recordings that are playedfor user 110 do not violate the DMCA.

If user 110 selects purchase-button 804, user 110 wants to purchase acopy of the sound recording that is currently being played. In oneembodiment, after user 110 selects purchase-button 804, device 202communicates with a remote server to verify that the user is qualifiedto make the purchase (e.g., does the user have enough money is his orher account) (step 914). If device 202 determines that user may purchasethe sound recording that was playing when purchase-button 804 wasactivated, control passes to step 916, otherwise control passes back tostep 910. In step 916, device 202 may create a decrypted copy of thesound recording for user 110 to listen to whenever the user so desires.That is, device 202 may allow user 110 to listen to any one of the soundrecordings that user 110 has purchased at anytime.

If user 110 activates more-button 806, user 110 wants to hear more soundrecordings that are like the current sound recording being played. Inresponse to activation of more-button 806, device 202 updatesappropriately the profile 219 of the currently selected audio channel(step 918). If the profile 219 is stored in storage device 214, device202 updates the profile 219 directly. Otherwise, if the profile 219 isstored on server 280, device 202 transmits an update profile message toserver 280. In this case, the update profile message indicates that user110 selected more-button 806 and contains a sound recording identifierthat identifies the current sound recording being reproduced. In oneembodiment, whenever profile 219 is updated, a new playlist 218 and/orwanted list 215 corresponding to the selected audio channel is generatedand stored in storage device 214.

If user 110 activates like-button 808, user 110 wants to add the soundrecording being played to his or her list of most favorite soundrecordings (e.g., to favorite sound recordings table 304). In responseto activation of like-button 808, device 202 updates appropriately theprofile 219 of the currently playing audio channel (step 920). If theprofile 219 is stored in storage device 214, device 202 updates theprofile 219 directly. Otherwise, if the profile 219 is stored on server280, device 202 transmits an update profile message to server 280. Inthis case, the update profile message indicates that user 110 selectedlike-button 808 and contains a sound recording identifier thatidentifies the current sound recording being reproduced.

Advantageously, in one embodiment, user 110 can indicate the degree towhich he or she likes the sound recording that is playing. In oneembodiment, user 110 indicates the degree to which he or she likes thesound recording that is playing by the number of times user 110activates like-button 808 while the song is playing. For example, ifuser 110 likes the song that is playing a great deal, user 110 mightactivate like-button 808 three times in quick succession. Whereas, ifuser 110 likes the song that is playing, but only likes it a smalldegree compared to other songs he or she likes, user 110 might activatelike-button 808 only once while the song is playing. The appropriateprofile 219 is updated to reflect the degree to which the user likes thesong that is playing. In another embodiment, user 110 indicates thedegree to which he or she likes the sound recording that is playing bythe length of time that user 110 holds down like-button 808. Forexample, if user 110 likes the song that is playing a great deal, user110 would hold down the like-button 808 for a longer period of time thanif user 110 only liked the playing song a little bit.

If user 110 doesn't want to hear the current sound recording ever again,he or she can select dislike-button 810. In response to activation ofdislike-button 810, device 202 stops reproducing the current soundrecording and updates appropriately the profile 219 of the currentlyplaying audio channel (step 922). That is, device 202, at a minimum,adds the playing sound recording the user 110's list of least favoritesound recordings. If the profile 219 is stored in storage device 214,device 202 updates the profile 219 directly. Otherwise, if profile 219is stored on server 280, device 202 transmits an update profile messageto server 280. In this case, the update profile message indicates thatuser 110 selected dislike-button 810 and contains a sound recordingidentifier that identifies the current sound recording being reproduced.After step 922, control passes back to step 902 where another soundrecording is selected and reproduced.

In one embodiment, user 110's use of dislike-button 810 may be limited.For example, user 110 may only activate dislike-button a predeterminednumber of times in any given predetermined time interval. If user 110'sactivation of dislike button causes this limit to be exceeded, thendevice 202 will not skip to the next sound recording in response to theactivation, as it otherwise might. A reason for this feature could be toensure that the set of sound recordings that are played for user 110 donot violate (i.e., conforms to) the DMCA.

When user activates off-button 609, process 900 ends (step 924).

Preferably, in performing step 902, the sound recordings may be selected“intelligently.” For example, the sound recordings are selected suchthat the resulting set of selected sound recordings “matches” theprofile of the selected audio channel. That is, if the audio channel isspecified as follows: 40% Rock genre (30% Hard Rock and 10% Light Rock)and 60% Alternative genre, then the resulting set of selected soundrecordings should closely conform to this specification.

Additionally, the sound recordings can be selected to not only match theprofile of the audio channel, but also to conform to any statutory,regulatory or contractual requirement that governs the broadcasting ofsound recordings. For example, if there is a requirement that all songsnot owned by the listener are not allowed to be played more than oncewithin a certain time interval (e.g., you can't play a song more thanonce within any given hour), then device 202 will be configured so asnot to violate this requirement when it selects songs for reproductionin step 902. In short, device 202 can be programmed to ensure thatdevice 202 does not violate any statutory, regulatory or contractualrequirement, such as the DMCA.

As an additional feature, user 110 may have no direct control over whichsongs are selected in step 902. All that user 110 might directly controlis an audio channel's profile, which merely gives user 110 indirectcontrol over which songs are selected in step 902. That is, by havingdirect control over an audio channel's profile, user 110 may influencewhich songs are selected in step 902, but can not directly control whichsongs will get selected. Further, user 10 has no way to determine whichsongs will get selected. With these features, listening to an audiochannel may be just like listening to a conventional radio station interms of not knowing what is going to be selected next to be played.

Playlists

Preferably, to facilitate the selection of songs in step 902, thereexists a personalized playlist 218 for each active audio channel definedwithin system 200. That is, in one embodiment, each active audio channelhas an associated playlist 218. As shown in FIG. 2, playlists 218 can bestored either within consumer device 202 or on server 280.

A personalized playlist 218 includes a list of sound recordingidentifiers that identify sound recordings that have a high probabilityof being enjoyed by user 110. The sound recordings identified in aplaylist 218 may have a high probability of being enjoyed by user 110because, at the least, a majority of the identified sound recordings“match” (or “fit”) a profile 219 belonging to the audio channel to whichthe playlist is associated and user 110 has control over the contents ofthe profile. In one embodiment, all of the identified sound recordingsmatch the profile 219. A playlist 218 “matches” or “fits” a profile 219if at least a majority of the sound recordings identified by theplaylist match or fit the profile. 219.

Preferably, user 110 can not directly access any playlist 218. That is,user 110 should not be allowed to view or otherwise determine thecontents of any of the playlists 218. In one embodiment, this isaccomplished by encrypting each playlist 218. Thus, in a preferredembodiment, software program 250 may have the key to decrypt a playlistbut user 110 does not. At least one exception to this rule is that user110 may have direct access to a playlist 218 if user 110 owns a copy ofeach sound recording identified in the playlist 218.

FIG. 4 illustrates the information contained in an exemplary playlist218. As shown in FIG. 4, playlist 218 contains a list of sound recordingidentifies. Each sound recording identifier uniquely identifies a soundrecording. As mentioned above, in one embodiment, each sound recordingidentifier uniquely identifies a sound recording that matches theprofile 219 of the audio channel to which the playlist is associated. Asound recording can be any type of audio recording, such as a musicrecording, a song recording, or a recording of an audio news segment.Meta-data is preferably associated with each sound recording identifier.Preferably, the meta-data includes such information as the name of theartist(s) who created the sound recording, the name of an album on whichthe sound recording is recorded, the title of the sound recording, etc.Meta-data associated with a particular sound recording may be displayedto user 110 in display box 850 when the particular sound recording isplayed by device 220.

In one embodiment, a playlist generator 288 is provided to create foreach active audio channel a playlist 218 that matches the active audiochannel. In other embodiments, the playlists 218 may be created by aprofessional audio programmer or combination of a playlist generator 288and programmer. Playlist generator 288 may be installed in device 202 orin an external computing device, such as server 280 or PC 299, and ispreferably implemented in software. As one skilled in the art willappreciate, the operation of playlist generator is same whether it isinstalled in server 280, PC 299 or other external computing device, andthus only the embodiments where playlist generator is stored in server280 or device 202 are described, for the sake of brevity.

In generating a playlist 218 that is associated with a particular audiochannel, playlist generator uses the particular audio channel's profile219. Thus, if playlist generator is installed in server 280 and not ondevice 202, and the profiles 219 are stored in device 202 but not onserver 280, then before playlist generator 288 can generate a playlist218 to be associated with a given active audio channel, device 202 mustfirst transmit to server 280 the audio channel's profile information219. In this embodiment, after the playlist 218 is generated, server 280transmits the playlist 218 to device 202.

In one embodiment where a local sound recording library 216 is stored instorage unit 214, each playlist 218 may be constructed so as to containonly sound recording identifiers that identify a sound recording that isin library 216. Thus, in this embodiment, playlist generator 288 usesthe information in catalogue 217 in conjunction with a profile 219 tocreate a playlist 218. Consequently, if playlist generator is installedin server 280 and not on device 202, then before playlist generator 288can generate a playlist 218, device 202 must first transmit to server280 library catalogue 217.

Each playlist 218 created by playlist generator 288 preferably matchesthe profile that is used in creating the playlist. So, for example, ifplaylist generator 288 creates a playlist 218 using a profile thatindicates that artist ABC is one of the user's least favorite artists,then playlist 218 might not contain any sound recordings from artistABC. Similarly, for example, if the profile indicates that one of user110's favorite songs is “Let it Be” by the Beatles, then this song maybe included in the playlist 218. Also, as anyone skilled in the art canappreciate, a profile 219 may include preferences for othercharacteristics, such as tempo.

As an additional feature, playlist generator 288 or the programmer thatcreates playlist 218 can create the playlist 218 so that for each soundrecording identified in the playlist 218 there is provided an indicationof whether or not the identified sound recording may be pre-announced.

Audio Channel Profiles 219

Each active audio channel has as an associated channel profile 219. Asdiscussed above, the profile 219 belonging to an audio channel may beused, in one embodiment, to create the playlist 218 associated with theaudio channel. In certain embodiments, the channel profiles 219 may bestored in storage device 214. In other embodiments, profiles 219 may bestored on server 280.

Referring to FIG. 3, an exemplary audio channel profile 219 isillustrated. The profile 219 illustrated in FIG. 3 belongs to amusic/information channel, as opposed to an all music channel or an allinformation channel. Channel profile 219 contains channel specificationinformation for the music/information channel.

As shown in FIG. 3, the channel specification information, according toone embodiment, may include a table of one or more music genres(“genre-table” 301) with corresponding genre percentages, and, for eachlisted genre, it may include a table of styles associated with the genre(“style tables” 302) and corresponding style percentages. Profile 219additionally may include a favorite artists table 303, a favorite soundrecording table 304, a least favorite artists list 305, and a leastfavorite sound recordings list 306. Favorite artists table 303 includestwo columns. One column is for identifying an artist and the othercolumn contains an integer value between and including the numbers 1 and3. This column represents the degree to which user 110 likes thecorresponding artist. A value of 1 means user 110 likes thecorresponding artist only a very little, while a value of 3 means user110 likes the corresponding artist very much. A value of 2 means user110 likes the corresponding artist more than a just a little, but notvery much.

Likewise, the favorite sound recordings table includes two columns, onecolumn for identifying a sound recording and one column for indicatingthe degree to which user 110 likes a particular sound recording in thetable. Because, in this embodiment, profile 219 belongs to amusic/information channel, profile 219 also includes news itemcategories and keywords 310. The creation of channel profiles aredescribed further below with reference to FIGS. 15–17.

Those skilled in the art will appreciate that the present invention isnot limited to any particular design of profile 219. As is appreciatedby those skilled in the art, all that is required is that profile 219 bedesigned to contain profile information from which a “personalized”playlist can be generated. That is, profiles 219, at a minimum, containinformation corresponding to, or related to, user 110's sound recordingpreferences. In short, the profile 219 shown in FIG. 3 is used merely toillustrate an embodiment of the invention and not to limit theinvention.

Wanted Lists

In certain embodiments, each active audio channel defined within device202 has an associated wanted list 215 that is stored in storage device214. As it's name implies, a wanted list 215 contains a list of wanteditems. In this system, the wanted items are copies of sound recordings.

FIG. 5 illustrates the information contained in an exemplary wanted list215. As illustrated in FIG. 5, wanted list 215 contains a list of soundrecording identifiers and an indicator for each listed sound recordingthat indicates whether the sound recording is in library 216 or not. Atthe least, a majority of the listed sound recording identifiersidentifies a sound recording that matches the profile belonging to theaudio channel to which the wanted list 215 is associated. However, it ispreferred that each listed sound recording identifier identifies a soundrecording that matches the profile belonging to the audio channel towhich the wanted list 215 is associated. Also as illustrated in FIG. 5,a variety of information may be associated with each sound recordingidentifier, such as: the music genre to which the sound recordingbelongs, the style categories within the genre(s) to which the soundrecording belongs, and meta-data concerning the sound recording. Themeta-data may include such information as the artists name, album name,song title, etc.

Wanted lists 215 may be created by a list generator 287 or by a systemoperator. Like playlist generator 288, list generator 287 can beinstalled in device 202 or in an external computing device, such asserver 280 or PC 299, and is preferably implemented in software. For thesake of brevity, only the embodiments where list generator 287 is storedin server 280 or device 202 is described.

In creating a wanted list 215, list generator 287 may use the profileinformation stored in the profile 219 belonging to audio channel withwhich the list 215 is intended to be associated. Thus, if list generator287 is installed in server 280 and not on local device 202, and theprofiles 219 are stored in local device 219 but not on server 280, thenbefore list generator 287 can generate a wanted list 215 to beassociated with a given active audio channel, device 202 must firsttransmit to server 280 the given audio channel's profile information219. Also, if list generator 287 is installed on server 280 and notdevice 202, then after list generator 287 creates the list 215, the list215 is transmitted by server 280 to device 202.

In one embodiment, wanted list 215 may not be accessed directly by user110. That is, in one embodiment, user 110 may not be allowed to view orotherwise determine the contents of any of the wanted lists 215. Thismay be accomplished by encrypting each wanted list 215 so that onlysoftware program 250 can decrypt the wanted lists.

A playlist 218 associated with a given audio channel and stored instorage unit 214 and a wanted list 215 associated with the same audiochannel are similar in that both the playlist 218 and the wanted list215 contain one or more sound recording identifiers that identify asound recording that fits the profile of the audio channel to which theyare associated. They are different, however, in that a playlist 218preferably does not contain any sound recording identifiers thatidentify a sound recording that is not in library 216, whereas wantedlist 215 is not so constrained. Additionally, in many embodiments, awanted list 215 may contain a much longer list of sound recordingidentifiers than does a playlist 218.

Details of the Operation of an Audio Channel

FIGS. 10–14 and 26–28 illustrate various different processes 1000, 1100,1200, 1300, 1400, 2600, 2700 and 2800, respectively, that are performedby device 202 in response to user 110 selecting to listen to anavailable, active audio channel.

Referring to FIG. 10, process 1000 is preferably used in the embodimentwhere a profile 219 belonging to the selected audio channel and a localsound recording library 216 is stored in storage device 214, but neithera wanted list 215 nor a playlist 218 corresponding to the selected audiochannel is stored in storage device 214.

Process 1000 is identical to process 900, with the exception of step1002. In step 1002, device 202 selects a sound recording from library216 that fits the profile 219 of the selected audio channel. In oneembodiment, library catalogue 217 is examined to select a soundrecording from library 216 that fits the profile 219. As illustrated inFIG. 25, in one embodiment, for each sound recording in library 216,library catalogue maintains a record of the genre(s) and style(s) towhich the sound recording belongs. This genre and/or style informationis used to by device 202 in determining whether a particular soundrecording in library 216 matches the profile 219.

Preferably, in performing step 1002, the sound recordings are selected“intelligently.” For example, the sound recordings are selected suchthat the resulting set of selected sound recordings does not violate anystatutory, regulatory or contractual requirement.

Referring to FIG. 11, process 1100 is preferably used in the embodimentwhere a wanted list 215 corresponding to the selected audio channel isstored in storage device 214, but a playlist 218 corresponding to theselected audio channel is not stored in storage device 214. As describedearlier, a wanted list 215 contains, among other things, a list of soundrecording identifiers that match the profile 219 belonging to theselected audio channel. Wanted list 215 is preferably created when theaudio channel to which it is associated is activated by user 110.

Like process 1000, process 1100 is identical to process 900, with theexception of step 1102. In step 1102, device 202 selects a soundrecording by choosing a sound recording that (1) is identified by asound recording identifier that is listed in the wanted list 215 that isassociated with the selected audio channel and (2) is stored in library216. Preferably, as with step 1002 of process 1000, in performing step1102, the sound recordings are selected intelligently.

Referring to FIG. 12, process 1200 is preferably used in the embodimentwhere a profile 219 belonging to the selected audio channel is stored instorage device 214, but neither a wanted list 215 nor a playlist 218corresponding to the selected audio channel is stored in storage device214.

Process 1200 begins in step 1202 where device 202 selects a soundrecording from library 216 that matches the selected audio channel'sprofile. After step 1202 control passes to step 1204, where device 202determines whether it may pre-announce the selected sound recording. Ifit may, control passes to step 1205, otherwise control passes to step1206. In step 1205 the selected sound recording is audibly and/orvisually announced to user 110. After step 1205, control passes to step1206. In step 1206, device 202 begins playing the selected soundrecording.

While the selected sound recording is being played for the listener,device 202 selects another sound recording that matches the selectedaudio channel's profile (step 1208). Next, a determination is made as towhether the sound recording selected in step 1208 is part of the soundrecording library (step 1210). If the selected sound recording is partof the sound recording library, control passes to step 1226, otherwisecontrol passes to steps 1212 and 1214.

In step 1226 a determination is made as to whether the sound recordingcurrently being reproduced is finished. If it is finished, device 202determines whether it may pre-announce the sound recording selected instep 1208 (step 1230). If it may, control passes to step 1231, otherwisecontrol passes to step 1232. In step 1231 the sound recording selectedin step 1208 is audibly and/or visually announced to user 110. Afterstep 1231, control passes to step 1232. In step 1232, device 202 beginsplaying the sound recording selected in step 1208.

If the current sound recording is not finished, device 202 determineswhether next-button 802 or dislike-button 810 were selected by user 110(step 1228). If either of those buttons were selected, then controlpasses to step 1226.

In step 1214, device 202 automatically downloads the sound recordingselected in step 1208 from server 280, stores the recording onto storagedevice 214, and adds the recording to local sound recording library 216.Preferably, the downloaded recording is encrypted (either by the serverbefore it transmits the recording to device 202 or by device 202 afterit receives the recording). In this way, because the sound recording isencrypted, only authorized people or systems can directly access therecording. Preferably, user 110 is not authorized to directly access thesound recording. That is, device 202 does not give user 110 thecapability to play the sound recording whenever user 110 so desires. Itis also preferred that the sound recording be compressed before it istransmitted to save time in downloading the sound recording.

In step 1212, device 202 selects a sound recording from library 216 thatmatches the selected audio channel's profile. Preferably, the soundrecording selected in step 1212 is very similar in genre and style tothe sound recording selected in step 1208. Next, device 202 determineswhether the sound recording currently being played is finished (step1216). If it is finished, control passes to step 1220, otherwise controlpasses to step 1218.

In step 1218, device 202 determines whether next-button 802 ordislike-button 810 were selected by user 110. If either of those buttonswere selected, then control proceeds to step 1220, otherwise the processreturns to step 1216.

In step 1220, device 202 determines whether the sound recording that isbeing downloaded in step 1214 is ready to be played. That is, itdetermines, among other things, whether a sufficient amount of the soundrecording has been successfully downloaded and stored onto storagedevice 214. If the sound recording is ready to be played, then controlpasses to step 1230, otherwise control passes to step 1222. In step1222, device 202 determines whether it may pre-announce the soundrecording selected in step 1212. If it may, control passes to step 1223,otherwise control passes to step 1224. In step 1223 the sound recordingselected in step 1212 is audibly and/or visually announced to user 110.After step 1223, control passes to step 1224. In step 1224, device 202begins playing the sound recording selected in step 1212. After step1224, control passes back to step 1208.

Referring to FIG. 13, process 1300 is preferably used in the embodimentwhere a wanted list 215 corresponding to the selected audio channel isstored in storage device 214, but a playlist 218 corresponding to theselected audio channel is not stored in storage device 214. Process 1300is identical to process 1200, with the exception of steps 1302, 1308,and 1312. In step 1302, device 202 selects a sound recording that (1) islisted in the wanted list 215 that is associated with the selected audiochannel and (2) is stored in library 216. In step 1308, device 202selects a sound recording that is listed in the wanted list 215 that isassociated with the selected audio channel. And in step 1312, device 202selects a sound recording that (1) is listed in the wanted list 215 thatis associated with the selected audio channel and (2) is stored inlibrary 216.

In one embodiment, after device 202 performs step 1214, device 202determines the next N sound recordings that are to be played and thatare not stored in library 216 and downloads those N sound recordings(this could be done sequentially or all at one time or other ways). Ncan be any integer greater than or equal to 1. In this way, when a soundrecording is selected to be played in step 1308, it is likely that thesound recording will be in library 216.

Although not shown as part of process 1200 or 1300, when eithernext-button 802 or dislike-button 810 are selected, device 202 ceasesplaying the currently playing sound recording. Additionally, ifdislike-button 810 is selected, the profile of the currently selectedaudio channel is appropriately updated.

Also, although it is not shown in either process 1200 or process 1300,device 202 processes the more-button 806, purchase-button 804,like-button 808, and off-button 609 activation event in the same manneras was described with reference to process 900.

Referring to FIG. 14, process 1400 is preferably used in the embodimentwhere a local sound recording library 216 and a playlist 219 associatedwith the selected audio channel are stored in storage device 214, andthe playlist 218 only lists sound recording identifiers that identify asound recording stored in library 216. Process 1400 is identical toprocess 900, with the exception of step 1402. In step 1402, device 202selects a sound recording that is listed in the playlist 218.

Preferably, in this embodiment, playlist 218 contains an ordered list ofsound recordings having a beginning and end, and, in selecting a soundrecording from the playlist 218, device 202 simply begins at thebeginning of the playlist and selects the recordings in the order inwhich they are listed. Consequently, device 202 keeps track of the lastsound recording that it selected so it knows the next sound recording toselect. In one embodiment, when the last sound recording that device 202selected is at or near the end of the playlist, device 202 will useplaylist generator 288 to generate a new playlist 218. In anotherembodiment, a new playlist 218 is generated on a periodic basis (i.e.,daily, weekly, . . . ). In still another embodiment, a new playlist 218is generated for a given active audio channel whenever the active audiochannel's profile is updated.

Preferably, playlist generator 288 uses the existing playlist 218, theprofile 219 associated with the existing playlist 218, and librarycatalogue 217 to create a new playlist 218. Alternatively, if playlistgenerator 288 is installed in server 280 as opposed to in device 202,then device 202 may transmit to server 280 the existing playlist 218,the profile 219 associated with the existing playlist 218, and librarycatalogue 217 (if these items are not already stored on server 280).Playlist generator 288 installed on server 280 will then have theinformation necessary to create the new playlist. After the new playlistis created, it is transmitted from server 280 to device 202, where it isthen stored in storage unit 214 and associated with the appropriateaudio channel.

Regardless of where playlist generator 288 is installed, playlistgenerator 288 preferably creates only playlists that (1) conform to theDMCA or similar statute, regulation or contract and (2) matches theprofile 219 of the audio channel with which the playlist 218 isassociated.

Referring to FIG. 26, process 2600 may be used in the embodiment wheredevice 202 does not maintain a local sound recording library 216.Process 2600 begins in step 2602, where device 202 selects a soundrecording based on the channel selected by user 110. This can beaccomplished by either (A) choosing, from a given set of soundrecordings, a sound recording that fits the profile of the selectedaudio channel, or (B) choosing a sound recording that is identified by asound recording identifier that is listed in the wanted list 215 and/orplaylist 218 that is associated with the selected audio channel. Afterstep 2602, device 202 downloads the selected song from a remote server(e.g., server 280) (step 2604). After step 2604, control passes to step2606.

In step 2606, device 202 determines whether it can pre-announce the mostrecently selected sound recording. If it can pre-announce the soundrecording it will (step 2608), otherwise control passes to step 2610.

In step 2610, device 202 plays the most recently selected soundrecording for user 110 to hear. Device 202 also selects N number ofsound recordings based on the currently selected audio channel (step2612), where N is an integer greater than or equal to 1. Preferably, Nis determined by the amount of free space available in a local cache269, which can be implemented using memory available within in dataprocessing unit 212 (such as RAM) or which can be implemented usingstorage space available in storage device 214, as is illustrated in FIG.2. While the sound recording is being reproduced for user 110, device202 performs steps 2614–2630 in parallel with steps 2632–2634.

In step 2632, device 202 downloads the selected N sound recordings froma remote server 280. In step 2634, device 202 stores each downloadedsound recording in local cache 269.

In steps 2614–2624, device 202 determines whether listen-button 603 hasbeen selected, whether dislike-button 810 has been selected, whethernext-button 802 has been selected, and whether the last sound recordingselected to be played (i.e., the “current” sound recording) is finishedplaying, respectively. If listen button 603 was selected, control passesback to step 2602 and, preferably, the local cache is cleared (i.e., allsound recordings stored in the cache are deleted). If dislike-button 810was selected, control passes to step 2618, where device 202 updatesappropriately the profile associated with the selected audio channel,stops playing the current sound recording, and may delete the currentsound recording from the cache 269 if it is stored in the cache 269(steps 2618, 2622, and 2626, respectively). If next-button 802 wasselected, control passes to step 2622, and if the current soundrecording is finished playing, control passes to step 2626. After step2626, control passes to step 2628.

In step 2628, device 202 determines whether there are any soundrecordings in the local cache 269 that are ready to be played. If not,device pauses and then returns to step 2628, otherwise control passes tostep 2630. In step 2630, device 202 selects a sound recording from localcache 269 that is ready to be played and control then passes back tostep 2606.

Referring to FIG. 27, process 2700 may be used in the embodiment wheredevice 202 does not maintain a local sound recording library 216.Process 2700 begins in step 2702, where device 202 selects a soundrecording based on the channel selected by user 110. This can beaccomplished by either (A) choosing, from a given set of soundrecordings, a sound recording that fits the profile of the selectedaudio channel, or (B) choosing a sound recording that is identified by asound recording identifier that is listed in the wanted list 215 and/orplaylist 218 that is associated with the selected audio channel. Afterstep 2702, device 202 downloads the selected song from a remote server(e.g., server 280) (step 2604). After step 2704, control passes to step2706.

In step 2706, device 202 determines whether it can pre-announce the mostrecently selected sound recording. If it can pre-announce the soundrecording it will (step 2708), otherwise control passes to step 2710.

In step 2710, device 202 plays the most recently selected soundrecording for user 110 to hear. Device 202 also selects another soundrecording based on the currently selected audio channel (step 2712).

While the sound recording is being reproduced for user 110, device 202performs steps 2714–2726 in parallel with step 2728. In step 2728,device 202 downloads the most recently selected sound recording (i.e.,the sound recording selected in step 2712) from a remote server 280.

In steps 2714–2724, device 202 determines whether listen-button 603 hasbeen selected, whether dislike-button 810 has been selected, whethernext-button 802 has been selected, and whether the last sound recordingselected to be played (i.e., the “current” sound recording) is finishedplaying, respectively. If listen-button 603 was selected, control passesback to step 2702 and. If dislike-button 810 was selected, controlpasses to step 2718, where device 202 updates appropriately the profile219 associated with the selected audio channel, and stops playing thecurrent sound recording (steps 2718 and 2722). If next-button 802 wasselected, control passes to step 2722, and if the current soundrecording is finished playing, control passes to step 2726.

In step 2726, device 202 determines whether the most recently selectedsound recording is ready to be played. If it is not ready, device pausesand then returns to step 2726, otherwise control then passes back tostep 2706.

Although it is not shown in either process 2600 or process 2700, device202 processes the more-button 806, purchase-button 804, like-button 808,and off-button 609 activation event in the same manner as was describedwith reference to process 900.

Referring to FIG. 28, process 2800 may be used in the embodiment wheredevice 202 does not maintain a local sound recording library 216.

Process 2800 begins in step 2802, where device 202 transmits a listenrequest message to a server 280. The listen request message includes anidentifier that identifies the audio channel to which user 110 hasselected to listen. Next, a connection is established between device 202and server 280 so that server 280 can stream audio data (e.g., soundrecordings) to device 202 for playback to user 110 (step 2804). Next,device 202 receives an audio stream from server 280 and reproduces thesound recording contained in the stream for user 110 to hear (step 2806)and waits for user 110 to activate button 603, 609, 802, 804, 806, 808,or 810 (step 2808). If listen-button 603 is activated, device 202transmits a listen request message to server 280 (step 2810) and controlgoes back to step 2808. If off-button 609 is activated, process 2800ends (step 2822). If next-button 802, more-button 806, like-button 808,or dislike-button 810 are activated, device 202 sends a command messageto server 280 (step 2812) and control goes back to step 2808. Server 280may process the command message in a similar manner as these buttons areprocessed by device 202 as described in process 900. For example, ifnext-button 802 is activated, server 280 may stop transmitting thecurrent sound recording and select a new sound recording to stream todevice 202.

The command message contains an identifier that identifies which of thebuttons was activated. If purchase-button 804 is activated, device 202or a server 280 determines whether user 110 may purchase the currentlyplaying sound recording. If not, and control goes back to step 2808,otherwise a copy of the currently playing sound recording is stored on astorage device accessible to user 110 and the control goes back to step2808.

Preferably, in performing process 2600, 2700 and 2800, the soundrecordings are selected such that the resulting set of sound recordingsthat are played matches the profile of the selected audio channel and,preferably, do not violate a statutory, regulatory, or contractualprovision.

Creating a New Audio Channel

One of the most important features of the present invention is providinguser 110 with the ability to create and modify audio channels. FIGS.15–17 are illustrations of possible user interfaces for enabling user110 to create and modify audio channels. Those skilled in the art willappreciate that the present invention is not limited to the userinterfaces illustrated in FIGS. 15–17 or to any particular userinterface. As is appreciated by those skilled in the art, any userinterface through which user 110 can specify his or her sound recordingpreferences could be employed in the present invention. In short, FIGS.15–17 are used merely to illustrate an embodiment of the invention andnot to limit the invention.

FIG. 15 illustrates a user interface page 1500. Page 1500 is referred toas the “create/modify profile form.” User 110 accesses user interfacepage 1500 by selecting button 704 on page 700 (see FIG. 7). Page 1500 isa fill-in form that enables user 110 to define or modify an audiochannel by inputting his or her sound recording preferences. Theinformation requested by fill-in form 1500 is used to illustrate one setof user preference information. Other information in addition to orinstead of the information requested by fill-in form 1500 could becollected from user 110 to create an audio channel.

In filling out form 1500, user 110 might first name the channel byinputting a name into text box 1502. Next, user 110 might select one ormore genres of music to be associated with the channel by selecting theappropriate genre checkboxes 1504. For the advanced users, a genreequalizer 1600 (see FIG. 16) can be accessed by selecting the genreequalizer-button 1505.

Genre equalizer 1600 can be used to specify the relative degree to whicheach of the selected genres dominates the audio channel. The equalizer1600 employs a fader for each of the selected genres. As shown in FIG.16 as an example, the selected genres are Rock, Jazz and Blues. Thus,the equalizer 1600 includes three faders: a Rock fader 1602, a Jazzfader 1603, and a Blues fader 1604. By manipulating the faders1602–1604, user 110 specifies the percent of the audio channel devotedto each of the selected genres. In the above example, Equalizer 1600also includes three percentage display boxes 1610–1612, onecorresponding to Rock 1610, one to Jazz 1611, and one to Blues 1612.Preferably, the percentage of music devoted to each genre is determinedby the following formula:% genre=(value of genre)/(total value)

The value of a genre is determined by the position of the fader and thenumber of positions on each fader. For example, in the equalizer of FIG.16, each fader has 10 possible positions. Thus each genre (Rock, Jazz,and Blues) can have one of 10 possible values. For example, if the Rockgenre has a value of 9, the Jazz genre has a value of 6, and the Bluesgenre has a value of 3, then the percentage of the audio channel devotedto Rock is 9/(9+6+3)=50%. Similarly, the percentage of the audio channeldevoted to Blues is 3/(9+6+3)=16.66%.

Alternatively, instead of manipulating the faders to determine thepercent of the audio channel devoted to each of the selected genres,user 110 can simply directly enter the desired percentages into thepercentage display text boxes 1610–1612.

In addition to the genre equalizer, there may also provided a styleequalizer for each selected genre of music. Thus, in the above example,the software would provide three style equalizers: one for Rock, one forJazz, and one for Blues. A style equalizer-button 1620 is activated toaccess the style equalizers.

FIG. 17 illustrates the three style equalizers in the above example, onefor each genre. Each genre has one or more associated styles. Forexample, the Rock genre may have the three associated styles: Hard Rock,Light Rock, and Acid Rock. Each style equalizer functions in the samemanner as the genre equalizer. That is, user 110 manipulates the fadersto determine the percent of the genre devoted to each style. Forexample, user 110 can specify that the Rock genre be composed of 80%Hard Rock and 20% Acid Rock. Thus, in the case where user 110 selectsthe Rock genre to comprise 50% of the audio channel, then 40% of theaudio channel would be devoted to Hard Rock and 10% would be devoted toAcid Rock.

Referring back to fill-in form 1500, after specifying the genrepercentages and the style percentages, user 110 can do any one or moreof the following: (1) input the names of one or more of his or her mostfavorite and least favorite artists into text boxes 1506 and 1507,respectively, (2) input the names of one or more of his or her mostfavorite and least favorite sound recordings into text boxes 1508 and1509, respectively, (3) specify news category of interest by inputting anews category into box 1510, and (4) specify one or more news keywordsby inputting one or more keywords into box 1511.

After user 110 has completed entering in the profile information usingpages 1500, 1600 and 1700, user 110 selects done-button 1590. In thismanner, user 110 is enabled to define personalized audio channels.

In one embodiment, after user 110 selects done-button 1590, the audiochannel profile information specified by user in pages 1500, 1600, and1700 is stored in a channel profile 219 in storage device 214.Additionally, the newly created audio channel may be placed in theactive state. Optionally, device 202 may then use wanted list generator287 and/or playlist generator 288 to create a wanted list 215 and/or aplaylist 218 that matches the profile information entered by user 110.Alternatively, if wanted list generator 287 and playlist generator 288are installed on server 280 instead of in device 202, then device 202transmits profile 219 to server 280. After receiving profile 219, server280 uses wanted list generator 287 and/or playlist generator 288 tocreate a wanted list 215 and/or a playlist 218 that matches the receivedprofile 219, and transmits the wanted list 215 and/or a playlist 218 todevice 202 where they are then stored in storage device 214.

In another embodiment, after user 10 selects done-button 1590, thechannel profile information specified by user in pages 1500, 1600, and1700 is transmitted to server 280, which then may store the receivedprofile information in a profile 219. Additionally, the newly createdaudio channel may be placed in the active state. In this embodiment, thesoftware program 250 can be a web browser or other thin client software.After receiving the audio channel profile information, server 280 useswanted list generator 287 and/or playlist generator 288 to create awanted list 215 and/or a playlist 218 that matches the received profileinformation, and transmits the wanted list 215 and/or playlist 218 todevice 202 where they are stored in storage device 214.

If user 110 specifies that U2 is one of his or her favorite artists, arelatively large number of sound recordings from U2 might be placed intothe personalized playlist and/or device 202 may select that artist morefrequently, but, in one embodiment, in no event is the artist selectedso frequently that in doing so device 202 would run afoul of a governingstatutory, regulatory or contractual provision (e.g., the DMCA). And ifa user specified one or more sound recordings as being favorite, thendevice 202 might ensure that those sound recordings are placed in thepersonalized playlist and may select those sound recordings morefrequently, but, in one embodiment, in no event are the sound recordingsplayed so often that in doing so device 202 would run afoul of agoverning statutory, regulatory or contractual provision. Similarly, inone embodiment, songs from the user's least favorite artists and theuser's least favorite songs are not included in the playlist 218 or areincluded on only a limited basis. Advantageously, wanted list generator287 and/or a playlist generator 288 could be programmed to determine aset of sound recordings that are similar to the user's favorite soundrecordings and to place this set of sound recordings into wanted list215 and/or a playlist 218.

Because a song recording list 215 or playlist 218 conforms to a profile219 associated with an audio channel as described above, song recordinglist 215 or playlist 218 should each contain a list of sound recordingsthat have a high probability of being enjoyed by user 110.

In an embodiment where user interface 220 is limited (e.g., device 202is a cable-tv set-top box as opposed to a personal computer), user 110may use a personal computer (PC) 299 or other like device to create theaudio channels instead of directly using device 202. In this embodiment,software program 250 is installed on PC 299. In this embodiment, afteruser 110 enters the audio channel specification information into pages1500, 1600, and 1700, the entered information is sent to server 280 orto device 202, which then may store the received information in aprofile 219. Server 280 or device 202 then creates a wanted list 215and/or playlist 218 in the manner described above and, in oneembodiment, server 280 then transmits the wanted list 215 and/orplaylist 218 to device 202. In this embodiment, the software program 250can be a web browser or other thin client software and server 280 canimplement a web server.

Additional methods for creating and/or modifying a wanted list 215 orplaylist 218 are described in U.S. Pat. No. 5,616,876 to Cluts and U.S.Pat. No. 5,819,160 to Foladare et al., both of which are incorporatedherein by this reference.

Modifying an Audio Channel's Profile

There are at least two ways in which an audio channel's profile may bemodified. One way, which has been described already, is for user 110 toselect more-button 806, like-button 808, or dislike-button 810. Anotherway is for user 110 to select an audio channel listed in box 602 andthen activate modify-button 606. After user 110 does this, page 1500 isdisplayed. Using page 1500, user 110 can modify the profile 219.

Immediately after an audio channel's profile 219 is modified, in oneembodiment, the playlist 218 and/or wanted list 215 associated with themodified audio channel may be updated to match the new profile 219.

The Local Sound Recording Library

Referring again to FIG. 2, local sound recording library 216 is acollection of sound recordings that are stored in storage device 214.The invention contemplates a number of mechanisms for building soundrecording library 216 (i.e., adding sound recordings to library 216).FIGS. 18–22 are flow charts illustrating example processes that can beused to add sound recordings to local sound recording library 216.

Referring to FIG. 18, a process 1800 for adding sound recordings tolocal sound recording library 216, according to one embodiment, isillustrated. In step 1802, user 110 is queried as to whether he or sheowns any sound recordings that he or she would like to add to library216. If user 110 responds in the negative, control passes to step 1808,otherwise control proceeds to step 1804.

In step 1804, sound recordings owned by user 110 may be stored instorage device 214 (if they are not already stored therein). In oneembodiment, a storage device drive 276 (e.g., a floppy disk drive or CDROM drive) is provided for receiving storage devices containing soundrecordings owned by user 110, or user 110 can download the soundrecordings the he or she owns from PC 299. Next (step 1806), librarycatalogue 217 is updated with the appropriate information concerning thesound recordings owned by the user (for example, user 110 may be askedto input the following for each sound recording: the artist's name, thetitle, the genre(s) to which sound the recording belongs, the styles(s)to which the sound recording belongs, etc.). Next (step 1808), device202 receives a sound recording that is being broadcast by a musicbroadcaster (such as music broadcaster 102) and plays the soundrecording for user 110. Following step 1808, device 202 determines theidentity of the received sound recording (step 1810). In digital andanalog audio broadcasting systems it is possible to transmit meta-dataalong with the sound recordings. The meta-data may include, among otherinformation, a sound recording identifier. This is just one way in whichdevice 202 can determine the identity of the received sound recording.One possessing ordinary skill in the relevant art will appreciate thatthe invention is not limited to this or any particular means foridentifying sound recordings and that a variety of identifying means areavailable.

After step 1810 control passes to step 1820. In step 1820, device 202determines whether the received sound recording is a “needed” soundrecording. A “needed” sound recording is a sound recording that is notin the sound recording library 216 and that matches an active profile219 or is listed in an active wanted lists 215. An active wanted list215 is a wanted list 215 that is associated with an active audiochannel. Similarly, an active profile 219 is a profile 219 that isassociated with an active audio channel.

Preferably, device 202 maintains a list of all needed sound recordings.This list is referred to as the needed list. If the received soundrecording is needed, control passes to step 1822, otherwise it passes tostep 1821. In step 1821, device 202 determines whether user 110 hasindicated a preference for the sound recording being played. In oneembodiment, user 110 can indicate his or her preference for a soundrecording that is playing by activating a like button on user interface220 during the play of the sound recording. If user has indicated his orher preference for the sound recording being played, then control passesto step 1822, otherwise control goes back to step 1808.

If the sound recording is needed or user 110 has indicated a preferencefor the sound recording, device 202 adds the sound recording to thelibrary 216. That is, in one embodiment, device 202 performs steps 1822and 1824. In step 1822, device 202 stores the sound recording in storagedevice 214. Preferably, the sound recording is also encrypted so thatuser 110 will not have direct access to the sound recording stored instorage device 214. Additionally, in one embodiment, a watermark isadded to the sound recording before it is encrypted. Next (step 1824),device 202 updates the library catalogue 217 (i.e., adds a new entrythereto), updates the active wanted lists 215 (if any) that list thereceived sound recording to indicate that the sound recording is now inlibrary 216. After step 1824, control passes back to step 1808.

Referring now to FIG. 19, a process 1900 for adding sound recordings tolocal sound recording library 216, according to another embodiment, isillustrated. In this embodiment, a wanted list 215 is stored in storagedevice 214 for each active audio channel. Process 1900 may be mostuseful where device 202 includes at least two receivers 210, but is notlimited to this environment. The first receivers is referred to as theprimary receiver and the second is referred to as the secondaryreceiver. The secondary receiver is the receiver that is not being usedby user 110 to receive a broadcast at the current point in time. Steps1902–1906 are identical to steps 1802–1806 and will not be describedhere.

In step 1908, device 202 determines a broadcast channel over which thegreatest number of “most needed” sound recordings are likely to bebroadcast in any given time interval. In one embodiment, a “most needed”sound recording is a sound recording that is not in library 216 and thatis listed in the wanted list 215 belonging to the highest ranked activeaudio channel. In this embodiment, step 1908 may be performed by thefollowing two steps: first, determining the highest ranked audio channelthat has one or more sound recordings listed in its associated wantedlist 215 that are not stored in library 216; and second, determining thebroadcast channel that most closely matches the profile of the audiochannel determined in the first step.

In another embodiment, a “most needed” sound recording is a soundrecording that is not in library 216 and that matches the profile 219 ofthe highest ranked active audio channel for which a playlist 218 cannotbe generated because of the contents (or lack of content) in local soundrecording library 216. In yet another embodiment, a “most needed” soundrecording is a sound recording that is not in library 216 and thatmatches the profile 219 of the highest ranked active audio channel.

User 110, in one embodiment, may manually rank the active audiochannels. As is evident to one skilled in the art, user interface page600 can easily be modified to enable user 110 to rank the active audiochannels. In another embodiment, device 202 is programmed to determinethe highest ranked active audio channel. For example, device 202 canmonitor user 110's use of device 202 to determine which active audiochannel user 110 listens to the most. Device 202 would then rank thatchannel the highest.

After step 1908 control passes to step 1910. In step 1910, device 202tunes a receiver 210 to the channel determined in step 1908. In theembodiment where there are multiple receivers, a process like process1900 can be performed in parallel for each receiver that is not beingused by user 110 to listen to a station. Next (step 1912), the receiver210 receives a sound recording broadcast over the channel determined instep 1908. The identity of the received sound recording is thendetermined (step 1914). After step 1914 control passes to step 1916. Instep 1916, device 202 determines whether the received sound recording isa needed sound recording. If the received sounds recording is needed,control passes to step 1918, otherwise control goes back to step 1912.

In step 1918, device 202 stores the sound recording in storage device214. Preferably, the sound recording is also encrypted so that user 110will not have direct access to the sound recording. Next (step 1920),device 202 updates the library catalogue 217 and updates the wantedlist(s) 215 that list the received sound recording to indicate that thesound recording is now in library 216. After step 1920, control passesback to step 1908.

Referring now to FIG. 20, a process 2000 for adding sound recordings tolocal sound recording library 216, according to another embodiment, isillustrated. In this embodiment, a wanted list 215 is stored in storagedevice 214 for each active audio channel. Process 2000 is identical toprocess 1900 with the exception of step 2008.

In step 2008, device 202 determines a broadcast channel over which thegreatest number of “needed” sound recordings are likely to be broadcastin any given time interval. A “needed” sound recording is a soundrecording that is not in library 216 and that is listed in any one ofthe active wanted lists 215. In one embodiment, to determine the channelover which the greatest number of needed sound recordings are likely tobe broadcast in any given time interval, device 202 first determineswhich active wanted list 215 has the greatest number of needed soundrecordings and then determines which broadcast channel most closelymatches the audio channel to which the active wanted list 215 that hasthe greatest number of needed sound recordings is associated. Forexample, if the active wanted list 215 that has the greatest number ofneeded sound recordings is associated with an audio channel that isdominated by the Jazz genre, then a broadcast channel that broadcastsmostly Jazz music would be the channel determined in step 2008.

Referring now to FIG. 21, a process 2100 for adding sound recordings tolocal sound recording library 216, according to another embodiment, isillustrated. Process 2100 is useful where device 202 includes tworeceivers 210, a primary receiver and a secondary receiver. Although notillustrated in process 2100, steps 1902–1906 of process 1900 arecontemplated as being part of process 2100.

In step 2102, device 202 creates the needed list of sound recordings,and in step 2104 device 202 receives a program schedule from musicbroadcaster 102. Preferably, the program schedule contains a list ofsound recording identifiers, the approximate time when each identifiedsound recording will be broadcast, and the channel over which the soundrecording will be broadcast. Preferably, for the purpose of complyingwith legal or contractual requirements, the content of the programschedule is not allowed to be viewed or otherwise discovered by user110. In one embodiment this is achieved through encryption. That is,music broadcaster 102 may encrypt the program schedule beforetransmitting it to device 202 and user 110 has no way of accessing the“key” to decrypt the program schedule.

After receiving the program schedule and after creating the needed list,device 202 uses them both to tune receiver 210 and/or a secondaryreceiver(s) 210 to an appropriate channel at an appropriate time (step2106). For example, if the needed list indicates that a particular soundrecording is needed and the program schedule indicates that theparticular sound recording will be broadcast on channel B atapproximately 10:30 p.m., then device 202 would tune a receiver 210 tochannel B at some point prior to 10:30 p.m.

After step 2106, control passes to step 2108. In step 2108, device 202receives a sound recording broadcast by music broadcaster 102. Next,device 202 determines the identity of the received song (step 2110).Then, in step 2112, device 202 determines whether the received soundrecording is on the needed list. If the received sounds recording isneeded, control passes to step 2114, otherwise control goes back to step2106.

In step 2114, device 202 stores the sound recording in storage device214. Preferably, the sound recording is also encrypted so that user 110will not have direct access the sound recording. Next (step 2116),device 202 updates the library catalogue 217, updates the active wantedlist(s) 215 that list the received sound recording to indicate that thesound recording is now in library 216, and removes the sound recordingfrom the needed list. After step 2116, control passes back to step 2106.

Referring now to FIG. 22, a process 2200 for adding sound recordings tolocal sound recording library 216, according to still anotherembodiment, is illustrated. Although not illustrated in process 2200,steps 1802–1806 of process 1800 are contemplated as being part ofprocess 2200.

In step 2202, device 202 receives from user 110 a specification for anew audio channel and creates a channel profile 219 from thisinformation. As described above, user 110 may enter channel profileinformation into device 202 using GUI pages 1500, 1600, and 1700. Next(step 2204), device 202 transmits the channel profile information to aremote server 280. Remote sever 280 uses the channel profile informationto create a wanted list 215. Remote server 280 then transmits the wantedlist 215 to device 202.

Upon receiving wanted list 215, device 202 stores the list in storagedevice 214 (step 2206). Next (step 2208), device 202 creates a “needed”list of sound recordings based on the sound recordings identified in thereceived wanted list and based upon the sound recordings that are inlibrary 216. That is, the needed list of sound recordings contains thesound recordings identified in the received list that are not currentlypart of library 216.

After creating the needed list, the needed list is transmitted to server280 (step 2210). After receiving the needed list, server 280electronically transmits to device 202 each sound recording identifiedin the needed list. Alternatively, server 280 creates an archive on aportable recording medium (e.g., a CD ROM, a floppy disk, or other likerecording medium) containing each song on the needed list and theportable recording medium is delivered to user 110 through conventionalpackage delivery means (e.g., FedEx, UPS, US Mail). Device 202 receivesthe transmitted sound recordings (step 2212) and stores each soundrecording in storage device 214 and updates library catalogue 217 andwanted list as required.

In the embodiment where the sound recordings are delivered to user 110via a portable recording medium, user 110 inserts the recording mediuminto storage drive 276 (e.g., CD ROM drive, floppy disk drive, etc.) sothat the sound recordings stored on the portable recording medium can becopied to storage device 214 and placed in library 216. Preferably, thesound recordings stored on the portable recording medium can only beplayed by device 202 in conjunction with an audio channel. Furthermore,device 202 does not provide user 110 with a mechanism for directlyaccessing any of the sound recordings on the storage portable medium.Thus, the only way for listener 110 to hear any of the sound recordingson the storage portable medium is to listen to an audio channel providedby device 202.

In an alternative embodiment, in step 2204, device 202 additionallytransmits library catalogue 217 to server 280. In this embodiment, step2206 may be skipped, server 280 performs step 2208, and step 2210 isskipped.

Because the amount of storage space available in storage device 214 maybe limited, it may be necessary to periodically or occasionally removesound recordings from library 216. One method that could be employed to“clean” the library is to remove all sound recordings that have not beenaccessed within a predetermined amount of time. Additionally, user 110may decide to de-active a channel and ultimatley delete the channel byselecting it and activating delete-button 608. In one embodiment, when achannel is deleted, the sound recordings in library 216 that fit theprofile of the delete channel and do not fit any profile of an activechannel, those sound recording may be deleted from the library, and anyplay-list 218 and/or wanted-list 215 associated with the deleted channelmay also be deleted. As is evident to one skilled in the art, a widevariety of other “cleaning” mechanisms are available.

Updating the Wanted Lists

Because new sound recordings are always being created, it is importantto occasionally update wanted lists 215, to the extent there are any.There are a variety of processes that could be employed to update wantedlists 215 and the invention is not limited to any one in particular. Forthe sake of completeness, a preferred process is described below withreference to FIG. 23.

FIG. 23 is a flow chart illustrating a process for updating wanted lists218. The process begins in step 2302 where device 202 transmits toserver 280 an active audio channel's profile information (e.g., whichgenres are included in the audio channel and which styles are includedin each genre) and the date the wanted list 215 associated with theaudio channel was last updated. The server 280 uses this information tocreate an update message. Preferably, in creating the update message,server 280 compares a list of “new” sound recordings (a “new” soundrecording in one that was loaded on the server on or after the date whenthe wanted list was last updated) to the received profile information todetermine whether any of the “new” sound recordings match the receivedprofile information (step 2304). After performing the comparison, theserver transmits one or more update messages to device 202 depending onwhether any of the new sound recordings fit the channel profile. Anupdate message includes a sound recording identifier that identifies aunique sound recording that fits the channel profile. The update messagemay also include meta-data concerning the identified sound recording.The meta-data included in the update message may include suchinformation as a list of genres and styles that apply to the identifiedsound recording. As discussed previously, a sound recording my belong tomore than one genre of music and may be associated with more than onestyle.

If the server transmits an update message, then the server may alsotransmit to device 202 a copy of the sound recording identified in theupdate message. Preferably, the copy of the sound recording is encryptedprior to being transmitted to device 202.

Device 202 receives the update message and sound recording (step 2306).Upon receiving the copy of the sound recording, device 202 stores thecopy in storage device 214 (step 2308). Similarly, upon receiving theupdate message, device 202 updates the appropriate wanted list 218 andupdates library catalogue 217 (steps 2310 and 2312). Process 2300 isperformed for each active audio channel on an occasional or periodicbasis.

While various embodiments/variations of the present invention have beendescribed above, it should be understood that they have been presentedby way of example only, and not limitation. Thus, the breadth and scopeof the present invention should not be limited by any of theabove-described exemplary embodiments, but should be defined only inaccordance with the following claims and their equivalents.

1. In a personalized audio system comprising a consumer devicecomprising a user interface for receiving input from a user of thesystem and a storage device for storing data, a method for providing oneor more personalized audio channels, wherein each personalized audiochannel has a profile associated therewith and each profile comprisesprofile information related to or concerning the user's sound recordingpreferences, the method comprising the steps of: storing a soundrecording library on the storage device, the sound recording librarycomprising a plurality of tracks; receiving from the user an indicationthat the user desires to listen to a selected one of the one or morepersonalized audio channels; selecting, in response to the receivedindication, a track based on the profile associated with the selectedpersonalized audio channel; retrieving the selected track; playing thetrack for the user; and updating the sound recording library, whereinthe step of updating the sound recording library comprises the steps of:transmitting an update request message to a server, wherein, in responseto receiving the update request message, the server determines whether atrack within a predetermined set of tracks matches the profileassociated with one of the one or more personalized audio channels, and,if the server determines that said track matches said profile, then theserver responds to the update request message by transmitting (a) anupdate message comprising a track identifier that identifies said trackthat matches the profile and/or (b) said track that matches the profile;receiving from the server the update message and/or said track; andadding said track that matches the profile to the library.
 2. The methodof claim 1, further comprising the step of creating a wanted list basedat least in part on a profile associated with one of the personalizedaudio channels, wherein the wanted list comprises a plurality of soundrecording identifiers.
 3. The method of claim 2, wherein the step ofupdating the sound recording library further includes the step of addingto the wanted list the track identifier received in the update messagereceived from the server.
 4. The method of claim 1, wherein the step ofadding the track to the library comprises the steps of encrypting thetrack-and storing the encrypted track-in the storage device so that theuser will not have direct access to the track.
 5. The method of claim 1,wherein the track transmitted from the server is encrypted and the stepof adding the track to the library comprises the step of storing theencrypted track in the storage device so that the user will not havedirect access to the track.
 6. The method of claim 1, further comprisingthe step of storing the profiles associated with the one or morepersonalized audio channels on the storage device.
 7. The method ofclaim 1, wherein the step of selecting the track based on the profileassociated with the selected personalized audio channel comprises thestep of selecting a track from a list of tracks, wherein the list wasgenerated based on the profile associated with the selected audiochannel.
 8. The method of claim 1, wherein the step of retrieving theselected track comprises retrieving the selected track from the soundrecording library.
 9. The method of claim 1, wherein the given set oftracks consists entirely of new tracks.
 10. The method of claim 1,wherein the update request message comprises at least a portion of aprofile associated with one of the one or more personalized audiochannels.
 11. The method of claim 1, wherein the update request messagecomprises information pertaining to a profile associated with one of theone or more personalized audio channels.
 12. The method of claim 1,wherein the update request message comprises date information, whichdate information is used by the server to determine said set of tracks.13. An apparatus for enabling a user to select a personalized audiochannel from a set of one or more personalized audio channels and tolisten to the selected personalized audio channel, wherein each of theone or more personalized audio channels has a profile associatedtherewith and each profile comprises profile information related to orconcerning the user's sound recording preferences, comprising: a storagedevice; a sound recording library stored on the storage device, thesound recording library comprising plurality of tracks; a user interfacethat enables the user to select one of the one or more personalizedaudio channels and enables the user to indicate that the user desires tolisten to the selected personalized audio channel; and a processing unitcomprising memory that stores software, wherein the software is operableto: select, in response to the user indicating a desire to listen to aselected personalized audio channel, a track based on the profileassociated with the selected audio channel; retrieve the selected track;play the track for the user; and update the sound recording library,wherein the software is configured to update the sound recording libraryby performing a process comprising the steps of: transmitting an updaterequest message to a server, wherein the server is configured to (a)determine whether a track within a given set of tracks matches theprofile associated with a personalized audio channel in response toreceiving the update message and (b) respond to the update requestmessage by transmitting (i) an update message comprising a trackidentifier that identifies said track that matches the profile and/or(ii) said track that matches the profile if the server determines thatsaid track matches said profile; receiving from the server the updatemessage and/or said track; and adding said track that matches theprofile to the library.
 14. The apparatus of claim 13, wherein thesoftware is further operable to create a wanted list based at least inpart on a profile associated with one of the personalized audiochannels, wherein the wanted list comprises a plurality of soundrecording identifiers.
 15. The apparatus of claim 14, wherein theprocess of updating the sound recording library further includes thestep of adding to the wanted list the track identifier received in theupdate message received from the server.
 16. The apparatus of claim 13,wherein the step of adding the track to the library comprises the stepsof encrypting the track and storing the encrypted track in the storagedevice so that the user will not have direct access to the track. 17.The apparatus of claim 13, wherein the track transmitted from the serveris encrypted and the step of adding the track to the library comprisesthe step of storing the encrypted track in the storage device so thatthe user will not have direct access to the track.
 18. The apparatus ofclaim 13, wherein the profiles associated with the one or morepersonalized audio channels are stored on the storage device.
 19. Theapparatus of claim 13, wherein the software selects the track based onthe profile associated with the selected personalized audio channel byperforming a process comprising the step of selecting a track from alist of tracks, wherein the list was generated based on the profileassociated with the selected audio channel.
 20. The apparatus of claim13, wherein the software retrieves the selected track from the soundrecording library.
 21. The apparatus of claim 13, wherein the updaterequest message comprises information pertaining to a profile associatedwith one of the one or more personalized audio channels.
 22. The methodof claim 13, wherein the update request message comprises dateinformation, and the server is configured to use the date information todetermine said set of tracks.
 23. An apparatus for enabling a user toselect a personalized audio channel from a set of one or morepersonalized audio channels and to listen to the selected personalizedaudio channel, wherein each of the one or more personalized audiochannels has a profile associated therewith and each profile comprisesprofile information related to or concerning the user's sound recordingpreferences, comprising: a storage device; a sound recording librarystored on the storage device, the sound recording library comprisingplurality of tracks; a user interface that enables the user to selectone of the one or more personalized audio channels and enables the userto indicate that the user desires to listen to the selected personalizedaudio channel; means for selecting, in response to the user indicating adesire to listen to a selected personalized audio channel, a track basedon the profile associated with the selected audio channel; means forretrieving the selected track; means for playing the selected track forthe user; and means for updating the sound recording library, whereinthe updating means comprises: means for transmitting an update requestmessage to a server, wherein the server is configured to (a) determinewhether a track within a given set of tracks matches the profileassociated with a personalized audio channel in response to receivingthe update message and (b) respond to the update request message bytransmitting (i) an update message comprising a track identifier thatidentifies said track that matches the profile and/or (ii) said trackthat matches the profile if the server determines that said trackmatches said profile; means for receiving from the server the updatemessage and/or said track; and means for adding said track that matchesthe profile to the library.
 24. The apparatus of claim 23, furthercomprising means for creating a wanted list based at least in part on aprofile associated with one of the personalized audio channels, whereinthe wanted list comprises a plurality of sound recording identifiers.25. The apparatus of claim 24, wherein the updating means furthercomprises means for adding to the wanted list the track identifierreceived in the update message received from the server.
 26. Theapparatus of claim 23, further comprising means for encrypting the tracktransmitted from the server and storing the encrypted track in thestorage device so that the user will not have direct access to thetrack.
 27. The apparatus of claim 23, wherein the track transmitted fromthe server is encrypted and the means for adding the track-to thelibrary comprises means for storing the encrypted track in the storagedevice so that the user will not have direct access to the track. 28.The apparatus of claim 23, wherein the profiles associated with the oneor more personalized audio channels are stored on the storage device.29. The apparatus of claim 23, wherein the means for selecting the trackbased on the profile associated with the selected personalized audiochannel is configured to select a track from a list of tracks, whereinthe list was generated based on the profile associated with the selectedaudio channel.
 30. The apparatus of claim 23, wherein the means forretrieving the selected track retrieves the selected sound recordingfrom the sound recording library.
 31. The apparatus of claim 23, whereinthe update request message comprises information pertaining to a profileassociated with one of the one or more personalized audio channels. 32.The method of claim 23, wherein the update request message comprisesdate information, and the server is configured to use the dateinformation to determine said set of tracks.